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【多选题】
“电子签名”具有以下特点:()A.
在其使用范围内、对签名持有人而言独一无二
B.
由签名持有人或以签名持有人单独掌握的方法所制造并附在数据电文中
C.
其制造及与有关数据电文的连接方式对电文的完整性提供可靠的保证
D.
安全、可靠性方面较传统签名更高
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【简答题】Poverty can help breed 2._________—Al-Qaida is a growing concern for the Yemenis.
【简答题】In Sanna, fears of an Al-Qaida attack led to temporary closures this week of the American, British and French 4.________.
【单选题】The goods are packed in cartons innerlined with material.
A.
water-proved
B.
water-protected
C.
water-proof
D.
water-tight
【单选题】The goods are packed in cartons interlined with material.
A.
water-proved
B.
water-protected
C.
water-proof
D.
water-tight
【单选题】Can we use this material for the decoration of the exhibition hall?
A.
Yes. Any available material will do for this job
B.
Yes. Water-proof material for the decoration of the hall will be used for the interior decoration
C.
No. Fire-proof materials should be used for the interior decoration
D.
No. Only highly-cost materials should be used for the interior decoration
【简答题】The report says Al-Qaida operates from the safety of Pakistan’s tribal areas on the border with 5.___________.
【单选题】下列关于有机物结构特点的说法正确的是：
A.
球棍模型是按照有机物的真实构型按比例放大得到的
B.
所有的有机物都存在同分异构体
C.
化学式符合C n H 2n+2 的有机物都是烷烃
D.
甲烷分子中的四个键角是相同的，但是四条共价键的键长是不同的
【简答题】一个小正方形的边长是3厘米，它的周长是多少厘米？用9个这样的小正方形拼成一个大正方形，大正方形的边长是多少厘米？周长呢？
【单选题】It can be inferred from the passage that American childrens books sold before 1785 were almost always ______.
A.
written by Maria Edgeworth
B.
attractive and interesting to children
C.
written by American authors
D.
intended only for religious and moral instruction
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